Example 8

hosts.yml

centos:
  hosts:
    provisioner:
      ansible_connection: local
    centos1:
      ansible_host: '192.168.77.22'
      ansible_port: 2345
ubuntu:
  hosts:
    ubuntu1:
      ansible_host: '192.168.77.23'
linux:
  children:
    centos:
    ubuntu:
  vars:
    ansible_become: true

Tip

The YAML file format is currently the most popular solution for building Ansible inventories, although the default inventory format is JSON.

Try to execute the whoami command on all hosts.

ansible all -m command -a "whoami"

Add ansible_become: false to the description of centos1 (indentation should match ansible_port and ansible_host) and run the command again.

What is the expected output of the command ?

The command will be run as the root user for all hosts except centos1. This example illustrates that hostvars take precedence over groupvars.